Grazing Occultation of 1850cK0 Magnitude 6.5 [Red = 5.9] Date: 2016 Feb 26 2h 46m, to 2016 Feb 26 2h 46m Nominal site altitude 100m E. Longit. Latitude U.T. Sun Moon TanZ PA AA CA o ' " o ' " h m s Alt Alt Az o o o 28 0 0 84 56 3.5 2 46 16 -11 0 211 99.00 18.4 354.25 2.82N 27 30 0 84 51 20.2 2 46 16 -11 0 211 99.00 18.4 354.26 2.81N 27 0 0 84 46 18.3 2 46 16 -11 0 210 99.00 18.4 354.28 2.79N 26 30 0 84 41 4.9 2 46 16 -11 0 210 99.00 18.5 354.29 2.77N 26 0 0 84 35 35.3 2 46 16 -11 0 209 99.00 18.5 354.31 2.76N 25 30 0 84 29 48.3 2 46 16 -11 1 209 99.00 18.5 354.33 2.74N 25 0 0 84 23 42.3 2 46 16 -11 1 208 87.51 18.5 354.35 2.72N 24 30 0 84 17 15.1 2 46 17 -12 1 208 74.09 18.5 354.36 2.70N 24 0 0 84 10 24.6 2 46 17 -12 1 207 63.78 18.6 354.38 2.68N 23 30 0 84 3 8.1 2 46 18 -12 1 207 55.60 18.6 354.40 2.67N 23 0 0 83 55 22.1 2 46 18 -12 1 206 48.95 18.6 354.42 2.64N 22 30 0 83 47 2.8 2 46 19 -12 1 206 43.42 18.6 354.45 2.62N 22 0 0 83 38 5.3 2 46 20 1 205 38.75 18.6 354.47 2.60N 21 30 0 83 28 23.4 2 46 21 2 205 34.73 18.7 354.50 2.57N 21 0 0 83 17 49.3 2 46 23 2 204 31.23 18.7 354.53 2.54N 20 30 0 83 6 13.1 2 46 25 2 204 28.13 18.7 354.56 2.51N 20 0 0 82 53 20.8 2 46 28 2 203 25.37 18.8 354.59 2.48N 19 30 0 82 38 52.7 2 46 31 3 203 22.86 18.8 354.63 2.44N 19 0 0 82 22 20.1 2 46 36 3 202 20.56 18.8 354.67 2.39N 18 30 0 82 2 57.1 2 46 41 3 202 18.40 18.9 354.72 2.34N 18 0 0 81 39 21.7 2 46 49 4 202 16.34 19.0 354.78 2.28N 17 30 0 81 8 42.4 2 47 2 4 201 14.28 19.0 354.86 2.21N 17 0 0 80 20 36.9 2 47 24 5 201 11.95 19.2 354.98 2.09N 17 0 0 80 20 36.8 2 47 24 5 201 11.95 19.2 354.99 2.08N 17 30 0 81 8 33.6 2 47 2 4 201 14.27 19.0 354.86 2.21N 18 0 0 81 39 21.8 2 46 49 4 202 16.33 19.0 354.79 2.28N 18 30 0 82 2 52.0 2 46 41 3 202 18.39 18.9 354.72 2.35N 19 0 0 82 22 20.2 2 46 36 3 202 20.55 18.8 354.67 2.40N 19 30 0 82 38 53.0 2 46 31 3 203 22.86 18.8 354.64 2.43N 20 0 0 82 53 21.7 2 46 28 2 203 25.37 18.8 354.60 2.47N 20 30 0 83 6 12.7 2 46 25 2 204 28.13 18.7 354.56 2.51N 21 0 0 83 17 49.4 2 46 23 2 204 31.22 18.7 354.53 2.54N 21 30 0 83 28 23.4 2 46 21 2 205 34.72 18.7 354.50 2.57N 22 0 0 83 38 5.3 2 46 20 1 205 38.74 18.6 354.47 2.60N 22 30 0 83 47 2.8 2 46 19 -12 1 206 43.42 18.6 354.45 2.62N 23 0 0 83 55 22.1 2 46 18 -12 1 206 48.94 18.6 354.42 2.65N 23 30 0 84 3 8.1 2 46 18 -12 1 207 55.58 18.6 354.40 2.67N 24 0 0 84 10 24.7 2 46 17 -12 1 207 63.75 18.6 354.38 2.69N 24 30 0 84 17 15.2 2 46 17 -12 1 208 74.08 18.5 354.36 2.70N 25 0 0 84 23 42.3 2 46 16 -11 1 208 87.50 18.5 354.35 2.72N 25 30 0 84 29 48.3 2 46 16 -11 1 209 99.00 18.5 354.33 2.74N 26 0 0 84 35 35.3 2 46 16 -11 0 209 99.00 18.5 354.31 2.76N 26 30 0 84 41 4.9 2 46 16 -11 0 210 99.00 18.5 354.29 2.77N 27 0 0 84 46 18.2 2 46 16 -11 0 210 99.00 18.4 354.27 2.80N 27 30 0 84 51 19.1 2 46 16 -11 0 211 99.00 18.4 354.26 2.81N 28 0 0 84 56 2.9 2 46 16 -11 0 211 99.00 18.4 354.25 2.82N Path coordinates are referred to WGS84 (as used by GPS), with the nominal site altitude being referenced to Mean Sea Level. The path is adjusted for the effects of refraction at low moon altitudes. Projected diameter of star 6 meters [Estimated] 1850 is double: AB 6.4 0.006" 84.2 (HR 4896) Graze path of B 0.02 km south, and 0.0 secs later compared to A Librations Long +0.19 Lat -1.72 P +354.98 D +1.95 Illumination of moon 90%- Elongation of Moon 143 Vertical Profile Scale approx. 6.83 km/arcsec at mean distance of moon Horizontal Scale Factor 1.78 deg/min At longitude 17.00: Limiting Magnitudes for various telescope apertures (in cm) CA\Tdia 5 10 15 20 25 30 35 -1.9 0.9 2.0 2.4 2.6 2.7 2.8 2.8 0.1 0.9 2.0 2.4 2.6 2.7 2.8 2.8 2.1 0.9 2.0 2.4 2.6 2.7 2.8 2.8 4.1 1.2 2.3 2.7 2.9 3.0 3.1 3.1 6.1 2.3 3.5 3.9 4.2 4.3 4.4 4.4 ------------------------------------------------------------------------------ Double star catalogue details Interferometric catalogue entries 125338.12-041328.2 PPM 195939 HR 4896 HD 112048 HIP 62915 12536-04 Date PA Sep M1 M2 O 1978.150 . . < 0.030 . . . . . 470 3.8 1 Hrt1984 S 1980.154 . . < 0.030 . . . . . 470 3.8 1 Hrt1984 S 1980.159 . . < 0.030 . . . . . 470 3.8 1 Hrt1984 S 1980.479 . . < 0.030 . . . . . 470 3.8 1 Hrt1984 S 1983.4280 . . < 0.036 . . . . . 549 22 3.8 1 Hrt1999d S 1984.0558 . . < 0.036 . . . . . 549 22 3.8 1 Hrt1999d S 1984.3752 . . < 0.036 . . . . . 549 22 3.8 1 Hrt1999d S 1984.3862 . . < 0.036 . . . . . 549 22 3.8 1 Hrt1999d S 1987.2640 . . < 0.036 . . . . . 549 22 3.8 1 Hrt1999d S 1991.25 . . G . . 6.45 . . . 511 0.3 1 HIP1997g H 1991.3296 . . < 0.036 . . . . . 549 22 3.8 1 Hrt1999d S ------------------------------------------------------------------------------ Results of Observer Scan UT Site Long. Lat. Dist. h m s Enontekiö 23.6 68.4 42km 3 0 38 Joensuu Jakokoski 30.0 62.7 120km 3 11 29 Kajaani Lehtikangas 27.7 64.2 110km 3 7 38 Kemijärvi 27.4 66.7 22km 3 7 6 Kilpisjärvi 20.8 69.0 111km 2 55 56 Kuhmo 29.5 64.1 47km 3 10 40 Kuopio Huuhanmäki 27.6 62.9 198km 3 7 28 Kuusamo 29.2 66.0 51km 3 10 7 Meltaus 25.4 66.9 49km 3 3 33 Muonio 23.7 68.0 61km 3 0 41 Nilsiä 28.1 63.2 161km 3 8 13 Nurmes 29.1 63.5 99km 3 10 2 Oulu Puolivälikangas 25.5 65.0 146km 3 3 46 Pello 24.0 66.8 108km 3 1 11 Posio 28.2 66.1 18km 3 8 22 Pudasjärvi 27.0 65.4 71km 3 6 20 Puolanka 27.7 64.9 73km 3 7 31 Raahe 24.5 64.7 202km 3 2 3 Ranua 26.5 65.9 57km 3 5 31 Rovaniemi 25.7 66.5 57km 3 4 11 Salla 28.7 66.8 78km 3 9 13 Savonlinna 28.9 61.9 221km 3 9 35 Sodankylä 26.6 67.4 24km 3 5 40 Tervola 24.8 66.1 113km 3 2 36 Tornio 24.1 65.8 150km 3 1 29 Varkaus 27.9 62.3 228km 3 7 52